Metallurgical furnace.



R. HUBNER.

METALLURGICAL FURNACE.

APPLICATION FILEDJUNE 8,1909.

Patented Se 1, 1909.

H 2 SEE SHEET 1.

WITNESSES:

aw/5% ywzm; BY

INVENTOR R. HUBNER.

METALLURGICAL FURNACE.

APPLICATION FILED JUNE 8, 1909.

93%5326 I Patented Sept. 21. 1909.

2 SHEETS-SHEET 2.

4 mvgmon ITNESSES: 6 W .WQJ/ at Q ATTORN ROBERT misuse, or NEW roan, N.Y.

METALLURGICAL FURNAGE.

Specification of Letters Patent.

Patented Sept. 21, 1909.

Application filed June 8, 1909. Serial No. 506,935.

1'0 all whom it may concern:

Be it known that I, ROBERT HiiBNER, a citizen of the United States,residing at New York city, county and State of New York,

;. have invented certain new and useful Imtudinal section on the line.VV of provements in Metallurgical Furnaces, of which the following is aspecification.

My invention more .especiall relates to a furnace desi ned to effectdesu furization of ores, althoug it may be used for other puroses.

p In United States Patents Nos. 899,403, dated September 22nd, 1908, and906,883, dated December 15th, 1908, I have respectively described afurnace for desulfurizing ores and a rocess of desulfurizing ores. My

improved 'u'rnace is an improvement u onthe construction disclosed in myPa ent 899,403 and is intended-to carry into eflect the processdescribed in my Patent 906,883.

The features of novelty ofmy resent furnace over that describedin'myFatent 899, 403 consist, in the provision of means for heatin thefurnace by the combination of gas an l air under pressure, in theprovision of means for localizing the heat atdifl'e'rent portions of thefurnace structure, in the pro vision of means for 'aitering thedirection of fio w of the products of combustion in the furnace, andgenerally, in the construction and arrangement of the flues, airpassages, etc.

The accompanying drawings will serve to illustrate my invention, inwhich Figure 1 is a vertical longitudinal section; Fig. 2 is a verticaltransvelse section on the line 11-11 of Fig. 1. Fig. 3 is a verticaltransverse section on the line III-III of Fig. 1. Fig. 4 is alongitudinal section on the line IVI'V of Fig. 1. Fig. 5 is a longi- Fi 1. F ig, 6 is a vertical longitudinal sect ion, showing a modificationof Fig. 1.

Referring to the drawings: 5 represents the furnace structure, and as inthe furnace described in my Patent No, 899,403, is provided with a grate6 and a combustion chamber 7. The combustion chamber 7 communicatesthrough the horizontal flues .8, 9,

directly with the vertical chimney flue 10, 3

and indirectly through the horizontal flues 11, '12, 13, vertical flues14, 15, and controlling dampers 16, 17. It will be understood withoutfurther description that by manipulation of the dampers 16, 17, all oftheflues 8, 9, 11, 12, 13 may be thrown into communication with thechimney flue 10, or 9, 11', 12, 13, separately.

, 18 represents a gas burner adapted to dis charge gas and air underpressure into the furnace chamber 7. V

' 19 represents gas pipe, 20 air pipe, 21-22 controlling valvesrespectively in the gas and air pipes. I prefer to use gas and air underpressure, respectively in the proportions of one part of gas to onequarter part of air, as this mixture results in a flame of very hightemperature. Situated at the opposite side of the furnace, or anyconvenient locality, are similar burners 23, 24:, 25, adapted todischarge gas and air respectively into the fiues 12, 11, o.

26 represents gas pipe, 27 air pipe, 2829 30 valves in the gas pipe and313233 valves in the air-pipe. The burners 23, 24, 25 are preferablysituated at the opposite side of the furnace from the burner 18,although they may be placed in any convenient locality.

It will be understood that the burners 18, 23, 2A, 25 may be used incombination or singly, as desired.

Situated between the dues 8, 9, 11, 12 are the ore chambers-F, E, D, C,and above the flue 13, the ore chambers A, B. These chambers communicatewith the exterior of the furnace through openings closed by doors areall connected to a common pipe 52, con- I nected at its end to theinduction orifice of a vacuum pump 53.

The method employed for operatin furnace is as follows: The ore to bethe esulfurized is introduced into the chamber A at the tip) of thefurnace. This chamber, it will be served, is not in direct communicationwith any of the heat dues of the furnace, but is separated therefrom bythe chamber B. T-his chamber is also somewhat larger than the otherchambers, the purpose of which is to permit evaporation of the moistureof the ore, by slow heating, which moisture is drawn off by one of thepipes will be understood without further descripvarious burners, heatinchamber A. After a time the ore is pushed through the opening 45 intothe chamber C, and so on rogressively downward throu h chambers E and F,it israwn from the furnace. Itwill be understood that doors 40, 41, 42,43, during the operation of the furnace, are luted to preventthe ingressof air, and that the action of the pump 53 is to produce a vacuum orpartial vacuum in the ore chambers. It

tion that thevacuum or partial vacuum so produced, prevents theaccumulation of the evolved gases in the ore chambers and prev'entstheir pressure from efi'ecting therapid evolution of the gases from theore treated.

To effect desulfurization of the ore it is usually not necessary tocarry the ore beyond the chamber E, or in other words, by the time theore reaches the chamber E, desulfurization has been effected. Thedesulfurization of the ore may be facilitated by increasing thetemperature of the furnace normally due to combustion at burner 18, tocombined effect of the combustion at burner 18 and fire on grate 6,through the burners 23, 24, 25. For certain grades of ore it isconsi'deredadvisable to commence the heating slowly and graduallyincrease the heat as the ore is progressed downward through the furnacestructure. With other ores it is advisable to commence the heatingslowly, then subject to a high heat,then to a lower heat and then to ahigh heat.

With still other grades of ore it is advisable I to concentrate the heatat about the center of the furnace. The various heating effects, asbefore stated, may be accomplished through the conjointemployment of theflues and dampers. The exact direction of t e flow of the products ofcombustion will of course depend upon circumstances, which will beevident to any one skilled in furnace management, and having a knowledgeof the ore to be treated. a

I wish it understood that I do-not limit myself to the specificconstruction. of the furnace shown and described, as it will be obviousthat it may be modified in many particulars without departing from thegeneral features of the invention disclosed.

Having thus described my invention,,l .claim Y 1. A metallurgicalfurnace, comprising a series of heating flues, a series of ore chambers,achimney flue, a series of gas and air .burners communicating with saidheating flues, means for controlling the direction of from which flow ofthe products ofcombustion through said. furnace and means forcontrolling the application of heat to said furnace.

2. A metallurgical furnace, comprising a series of heating fines, aseries of ore chambers, a chimney flue, a series of gas and air burnerscommunicating with said heating flues, means for controlling thedirection of flow of the products of combustion through said furnace,and means for controlling the application of heat to said furnace.

3. A metallurgical furnace, comprising a series of heating flues, aseries of ore chambers, alternately disposed, a chimney flue, a seriesof gas and air burners communicating with said heating flues, meansfor-controlling the direction of flow of the products of combustionthrough said furnace, and means for controlling the application of heatto different portions of said furnace.

diflerent portions of 4;. A metallurgical furnace, comprising a seriesof heating fines, a series of ore cham bers closed against theatmosphere, a chimney flue, a series of as and air burners communicatingwith said heating flues, an exhaust pump connected to the ore chambers,means for furnace, and means for controlling the application of heat tosaid furnace. I p

5. A metallurgical furnace, comprising a series of heating lines, aseries of communi eating closed ore chambers, a chimney flue, a seriesof (gas and air burners communicating with sai heating flues, means forcontrolling the direction of flow of the products of combustion throughsaid furnace, and means for controlling the. application of heatto saidfurnace.

6'. A metallurgical furnace, comprising a series of heating fines, aseries of ore chambers closed against the atmosphere and alter natelydisposed, a chimney flue, a series of gas and air burners communicatingwith said heating flues, means for controlling the direction of flow ofthe products of combustion through said furnace, and means forcontrolling the application of heat to different portions of saidfurnace.

7. A metallurgical furnace, comprising a series of heating fiues, aseries of ore chambers closed against the atmosphere, a chimney flue, aseries of gas and air burners communicating with said. heating flues,and adapted to deliver gas andair under pressure, means for controllingthe direction of flow of the products of combustio through sa d furnace,and means for contr lling the application of heat to different portionsof said furnace.

3. A metallurgical furnace, series of heating flues, a series of orechambers, a chimney flue, a series of gas and air burners communicatingwith said heating controlling the direction of flow of the productsof'combustion through "saidcomprising a of flow of the products ofcombustion through said furnace flues, and means for controlling theapplication of heat to different portions of sald furnace.

9. A metallurgical furnace, comprising a series of heating flues, aseries of ore chambers, a chimney flue, a series of gas andair burnerscommunicating with the heating flues, dampers for controlling thedirection of flow of the products of combustion through said furnaceflues,=and gas and air .valves for controlling the application of heatto diflerent portions of said furnace.

10. A metallurgical furnace, comprising a series of heatlng flues,a-series of ore chambers, a chimney flue, a combustion chamber andgrate, a series of gas and air burners, means for controlling thedirection of flow of the products of combustion through said furnace,and means for control-ling the application of heat to different portionsof said furnace.

11. A metallurgical furnace, comprising a series of horizontal heatingflues, vertical communicating flues, a series of horizontalore'chambers, a chimney flue, a series of gas and 'air burners adaptedto project a flame into the horizontal flues, means interposed betweenthe horizontal and vertical flues for controlling the direction of flowof the products of combustion through said furnace, and means forcontrolling the application of heat to differentportions of saidfurnace.

In testimony whereof, I aifix my signature, in the presence of twowitnesses.

ROBERT Ht'JBNER.

Witnesses: I

HELEN E. KoELsoH, WV. A. 'TowNER, Jr.

